(SQL Server) Duplicate OpensSSL Command that Decrypts Binary DER

This example duplicates the following:

openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD

Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @crypt int
    -- Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @crypt, 'CryptAlgorithm', 'pki'

    DECLARE @pem int
    -- Use "Chilkat_9_5_0.Pem" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Pem', @pem OUT

    DECLARE @success int
    EXEC sp_OAMethod @pem, 'LoadPemFile', @success OUT, 'qa_data/pem/myPem.pem', 'password'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pem, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END

    DECLARE @privkey int
    EXEC sp_OAMethod @pem, 'GetPrivateKey', @privkey OUT, 0
    EXEC sp_OAGetProperty @pem, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @pem, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END

    DECLARE @cert int
    EXEC sp_OAMethod @pem, 'GetCert', @cert OUT, 0
    EXEC sp_OAGetProperty @pem, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC @hr = sp_OADestroy @privkey

        EXEC sp_OAGetProperty @pem, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END

    EXEC sp_OAMethod @crypt, 'SetDecryptCert2', @success OUT, @cert, @privkey
    IF @success <> 1
      BEGIN
        EXEC @hr = sp_OADestroy @privkey

        EXEC @hr = sp_OADestroy @cert

        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END

    EXEC @hr = sp_OADestroy @privkey

    EXEC @hr = sp_OADestroy @cert

    EXEC sp_OAMethod @crypt, 'CkDecryptFile', @success OUT, 'qa_data/infile.enc', 'qa_output/outfile.dat'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @crypt
    EXEC @hr = sp_OADestroy @pem


END
GO